Cacao leaf procyanidins increase locally and systemically in response to infection by Moniliophthora perniciosa basidiospores

Flavan-3-ol monomers and oligomers from dimers to decamers were quantitatively determined by HPLC-FLD in leaves of four Theobroma cacao varieties. Cacao flush leaves had higher procyanidin content than mature leaves. Moniliophthora perniciosa basidiospore infection results in an increase in cacao le...

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Bibliographic Details
Published in:Physiological and molecular plant pathology 2007-04, Vol.70 (4), p.174-179
Main Authors: Chaves, Fabio C., Gianfagna, Thomas J.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Moniliophthora perniciosa
Phytopathology. Animal pests. Plant and forest protection
Procyanidins
Theobroma cacao
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Summary:Flavan-3-ol monomers and oligomers from dimers to decamers were quantitatively determined by HPLC-FLD in leaves of four Theobroma cacao varieties. Cacao flush leaves had higher procyanidin content than mature leaves. Moniliophthora perniciosa basidiospore infection results in an increase in cacao leaf procyanidins in the inoculated leaves, as well as in the uninoculated, adjacent, older leaves on an actively growing branch, resulting in both a local and systemic increase in procyanidin content in response to infection. Procyanidin oligomers increased significantly in leaves of the less susceptible genotype Scavina 6 upon infection, and total procyanidin levels were higher than in Cacao Comum a more disease susceptible genotype. Selection of genotypes with high constitutive and/or inducible content of procyanidins in young flush leaves may be a strategy to develop witches’ broom disease resistant cultivars.
ISSN:0885-5765
1096-1178
DOI:10.1016/j.pmpp.2007.09.004